<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-05-18 -138 01:05:00.000"
URSICode="SMK29"
StationName="Santa Maria"
GeoLatitude="-29.69"
GeoLongitude="307.81"
Source="Ionosonde"
SourceType="DPS-4D"
ScalerType="auto">
<SystemInfo UMLStationID="129">
<FrequencyStepping StartFrequency="2.0" StopFrequency="15.0">
<LinearStepping Step="0.025" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="2.5" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.05.18 (138) 01:05:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.22" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.99" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="75.82641" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202613805180105001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.975" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.656" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.878" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.277" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.277" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="260.277" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="257.813" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="241.035" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.564" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="24.011" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.607" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="12.623" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="24.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.980" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.775 2.8 2.825 2.85 2.875 2.9 2.925 2.95 2.975
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.277 265.000 270.000 277.500 285.000 292.500 300.000 310.000 320.000 332.681
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -1.5625 -1.5625 -1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="355">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 145.06467 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 180.12933 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 215.194 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 257.813 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21213934 0.23390245 0.2526677 0.26895854 0.28319094 0.29565945 0.30659118 0.31614733 0.32445762 0.331616 0.33769703 0.34275886 0.34684667 0.3499937 0.352225 0.3535571 0.354 0.3538872 0.35362422 0.35313663 0.3524263 0.35157037 0.35049725 0.34928474 0.34779045 0.3460946 0.34420422 0.34212705 0.33987162 0.3373105 0.33459514 0.33160487 0.32842398 0.32500646 0.32131362 0.3173745 0.3131621 0.3086588 0.30385724 0.2987607 0.2933115 0.28761622 0.2814985 0.27493244 0.2680173 0.26067755 0.25276694 0.24439329 0.23541926 0.2257689 0.21540093 0.20430143 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.20382386 0.20821576 0.21260764 0.21699953 0.22139141 0.22578329 0.23017518 0.23456706 0.23895895 0.24335083 0.24774273 0.25213462 0.2565265 0.26091838 0.26531026 0.26970214 0.27409405 0.27848592 0.2828778 0.28726968 0.2916616 0.29605347 0.30044535 0.30483723 0.3092291 0.313621 0.3180129 0.32240477 0.32679665 0.33118856 0.33558044 0.33997232 0.3443642 0.34875607 0.35314798 0.354 0.3831301 0.4219077 0.46361127 0.50824535 0.5558031 0.606283 0.6596493 0.7158761 0.77492577 0.83676255 0.9013149 0.96852237 1.0382972 1.1105365 1.1851166 1.2618891 1.3407012 1.4213488 1.5036116 1.5872662 1.6720303 1.7575914 1.8436177 1.9297282 2.0155528 2.1006699 2.184586 2.2668886 2.3470397 2.4245477 2.4989145 2.569598 2.6360846 2.6978936 2.754519 2.805508 2.8504362 2.8889215 2.9206178 2.9452531 2.9625993 2.9725008 2.975 2.9749365 2.9724817 2.9665976 2.9574695 2.945284 2.9302273 2.9124844 2.8922374 2.8696654 2.844943 2.8182404 2.7897224 2.7595477 2.7278697 2.694835 2.660584 2.6252506 2.5889618 2.5518384 2.5139945 2.4755378 2.4365697 2.397185 2.3574736 2.3175185 2.2773972 2.2371821 2.1969407 2.1567347 2.116622 2.0766547 2.0368822 1.9973483 1.9580939 1.9191561 1.8805681 1.8423605 1.8045603 1.767192 1.7302773 1.6938353 1.6578828 1.6224346 1.5875033 1.5530996 1.5192327 1.4859098 1.4531367 1.4209181 1.3892571 1.3581557 1.327615 1.297635 1.2682145 1.2393519 1.2110447 1.1832895 1.1560829 1.12942 1.1032963 1.0777063 1.0526444 1.0281042 1.0040796 0.9805637 0.9575497 0.93503034 0.9129983 0.89144623 0.8703664 0.8497512 0.8295927 0.80988324 0.79061484 0.7717796 0.7533696 0.7353771 0.71779394 0.7006124 0.6838247 0.667423 0.6513997 0.635747 0.6204575 0.6055236 0.5909379 0.5766932 0.5627821 0.5491977 0.5359327 0.5229805 0.5103341 0.49798673 0.48593196 0.47416326 0.4626742 0.45145857 0.44051018 0.42982304 0.41939119 0.40920883 0.39927024 0.38956985 0.3801022 0.37086186 0.36184362 0.3530423 0.3444529 0.3360704 0.32788998 0.31990695 0.31211665 0.30451453 0.29709616 0.2898572 0.2827934 0.27590063 0.2691748 0.262612 0.25620827 0.24995986 0.24386306 0.23791425 0.23210987 0.2264465 0.22092071 0.21552923 0.21026884 0.20513637 0.20012875 0.19524297 0.19047609 0.18582526 0.18128768 0.17686059 0.17254134 0.1683273 0.16421597 0.16020481 0.15629144 0.15247348 0.14874859 0.14511456 0.14156914 0.1381102 0.13473566 0.13144343 0.12823154 0.12509803 0.122040994 0.11905857 0.11614895 0.11331035 0.11054106 0.10783938 0.10520367 0.10263232 0.10012377 0.09767648 0.09528896 0.092959754 0.09068745 0.088470645 0.086308 0.084198184 0.08213992 0.08013193 0.07817302 0.07626196 0.0743976 0.0725788 0.07080445 0.069073446 0.06738476 0.06573733 0.06413017 0.06256229 0.061032724 0.059540544 0.058084838 0.056664713 0.0552793 0.05392775 0.052609235 0.051322952 0.05006811

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="2.975" PeakHeight="257.813" Num="5" zHalfNm="241.035" Error="1.068">
-42.074 -0.807 0.317 -0.043 -0.012
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="9" EarthRadius="6370.0">
<QuasiParabolic ID="0" StartDistance="6460.0205" EndDistance="6480.001" A="-5.5027394E11" B="1.69837632E8" C="-13104.63" Error="0.0016"/>
<QuasiParabolic ID="1" StartDistance="6480.0" EndDistance="6515.065" A="-1.23628085E11" B="3.8156816E7" C="-2944.0735" Error="0.00171"/>
<QuasiParabolic ID="2" StartDistance="6515.065" EndDistance="6550.129" A="0.0" B="36.619255" C="0.03440939" Error="7.52E-4"/>
<QuasiParabolic ID="3" StartDistance="6550.129" EndDistance="6551.0" A="1.07211989E13" B="-3.27327949E9" C="249840.52" Error="0.083"/>
<QuasiParabolic ID="4" StartDistance="6551.0" EndDistance="6572.0" A="-5.6852918E10" B="1.722648E7" C="-1304.796" Error="0.0797"/>
<QuasiParabolic ID="5" StartDistance="6572.0" EndDistance="6585.0" A="2.56299205E11" B="-7.80724E7" C="5945.575" Error="0.0599"/>
<QuasiParabolic ID="6" StartDistance="6585.0" EndDistance="6602.0" A="1.05875316E13" B="-3.21588045E9" C="244199.78" Error="0.0749"/>
<QuasiParabolic ID="7" StartDistance="6602.0" EndDistance="6617.0" A="1.49946378E13" B="-4.5509622E9" C="345311.72" Error="0.0406"/>
<QuasiParabolic ID="8" StartDistance="6617.0" EndDistance="6627.813" A="-3.8138504E13" B="1.15086244E10" C="-868197.94" Error="0.0107"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="105.194" Depth="0.154"/>
<TopsideChapman PeakHeight="257.813" PeakDensity="109809.24" PeakScaleHeight="12.623" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
